ChainCatcher news, according to official news, Flow released a testnet migration update: In preparation for the upcoming Crescendo testnet upgrade, we found that a core smart contract FiatToken has not been upgraded for Cadence 1.0 migration. FiatToken is a key dependency that affects hundreds of contracts.

In order to avoid interruptions to dependent smart contracts and improve the developer experience of builders on Flow, the testnet upgrade has been temporarily postponed while we work with contract owners to upgrade. Once there is a clear roadmap and timeline, the community will be informed in a timely manner.